diff --git a/avr/devices/c03/defs.asm b/avr/devices/c03/defs.asm
index 893aacd..097300c 100644
--- a/avr/devices/c03/defs.asm
+++ b/avr/devices/c03/defs.asm
@@ -170,6 +170,11 @@
 .equ ILI9341_LED_INPUT    = PORTD
 .equ ILI9341_LED_PIN      = PORTD5
 
+.equ ILI9341_BACKLIGHT_DDR       = DDRD
+.equ ILI9341_BACKLIGHT_OUTPUT    = PORTD
+.equ ILI9341_BACKLIGHT_INPUT     = PORTD
+.equ ILI9341_BACKLIGHT_PIN       = PORTD5
+
 
 
 ; ---------------------------------------------------------------------------